<template>
    <div>
       <div class="search">
            <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
        </div>
        <div
          class="search-content"
          ref="search"
          v-show="keyword"
          >
            <ul>
                <li
                  class="search-item border-bottom"
                  v-for="item of list"
                  :key="item.id"
                  @click="handleCityClick(item.name)"
                >
                  {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">
                   没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  computed: {
    hasNoData () {
      return !this.list.length
    }
  },
  watch: {
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 ||
               value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  methods: {
    handleCityClick (city) {
    // 点击事件的时候changeCity事件就被派发,store里面就action就接收这个changeCity和city参数
    //  this.$store.dispatch('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.search)
  }
}
</script>

<style scoped>
    .search{
      height: .72rem;
      padding: 0 .1rem;
      background: #00bcd4;
    }
    .search-input{
        box-sizing: border-box;
        width: 100%;
        height:.62rem;
        padding: 0 .1rem;
        line-height: .62rem;
        text-align: center;
        border-radius: .06rem;
        color: #666;
    }
    .search-content{
        z-index: 1;
        overflow: hidden;
        position: absolute;
        top:1.58rem;
        left: 0;
        right: 0;
        bottom: 0;
        background: #eee;
    }
    .search-item{
        line-height: .62rem;
        padding-left: .2rem;
        background: #fff;
        color: #666;
    }
</style>
